Alaska earthquakes

M3.0 earthquake 242 km SE of Old Harbor, Alaska

A magnitude 3.0 earthquake struck 242 km SE of Old Harbor, Alaska on Tue, May 11, 2021, 5:47 PM AKDT (01:47 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M4.5 226 km SE of Chiniak, Alaska. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
3.0 (ml), minor
Local time
UTC
2021-05-12 01:47:16 UTC
Depth
6.3 km (3.9 mi), shallow
Epicenter
55.464° N, 150.956° W
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 8.9 km horizontally, 8.1 km in depth
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
227°, poorly surrounded by stations
Stations used
36

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 15 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 2.1228 km SE of Chiniak, Alaska · 1964 days ago · 9 km deep · 82 km away
  2. 2.2250 km SE of Chiniak, Alaska · 1964 days ago · 10 km deep · 86 km away
  3. 4.5226 km SE of Chiniak, Alaska · 1958 days ago · 10 km deep · 97 km away
  4. 2.4215 km SE of Chiniak, Alaska · 1958 days ago · 10 km deep · 98 km away
  5. 2.3221 km SE of Chiniak, Alaska · 1958 days ago · 10 km deep · 95 km away
  6. 2.8224 km SE of Chiniak, Alaska · 1958 days ago · 10 km deep · 96 km away
  7. 2.1224 km SE of Chiniak, Alaska · 1958 days ago · 10 km deep · 83 km away
  8. 2.9250 km SE of Chiniak, Alaska · 1958 days ago · 10 km deep · 99 km away
  9. 2.1209 km SE of Chiniak, Alaska · 1958 days ago · 1 km deep · 87 km away
  10. 2.2235 km SSE of Chiniak, Alaska · 1958 days ago · 10 km deep · 68 km away
  11. 2.7216 km SE of Chiniak, Alaska · 1958 days ago · 10 km deep · 99 km away
  12. 2.0215 km SE of Chiniak, Alaska · 1957 days ago · 10 km deep · 79 km away
  13. 2.1179 km SE of Old Harbor, Alaska · 1949 days ago · 5 km deep · 68 km away
  14. 2.7202 km SE of Old Harbor, Alaska · 1917 days ago · 10 km deep · 40 km away
  15. 2.5215 km SE of Chiniak, Alaska · 1917 days ago · 10 km deep · 99 km away

Before

  1. 2.9233 km SE of Chiniak, Alaska · 1989 days ago · 10 km deep · 86 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000e29r. Read Sun, Sep 27, 2026, 1:44 AM UTC.